Note to King Lear, 2.2.132: "stocking his messenger"

King Lear,
Act 2, Scene 2, line 132

Stocking his messenger: i.e., putting the king's messenger in stocks. —Part of the purpose of putting an offender in stocks was to shame the person, and Kent points out that if he is put in stocks King Lear will also be exposed to shaming.
Kent in Stocks